Line-lock mechanism and margin stop



4. 1,512,025 Oct' 21 192 o. A. HoKANsoN Y LINE LOCK MECHANISM ANDMARGIN' STOP Filed Aug. 25 1921 3 Sheets-Sheet .l

Oct. 21. 1924.

O. A. HOKANSON LINE LOCK MECHANISM AND MARGIN STOP s sheets-sheet 2Filed Aug. 25 192'1 Oct. 21 1924. 1,512,025

o. A. HoKANsoN LINE LOCK MECHANISM AND MARGIN STOP Filed Aug. 25 1921 I5Sheets-Sheet 5 Patented Oct. 21, 1924.

UNITED STATES PATENT omo A. HoKANsoN, or Wo'o'nsTocK, TLLiNoIs,Assrenjon fro- Woonsroox y'TYPE- wnrmnn COMPANY, on Woonsroox, Immers, ACORPORATION von ILLINOIS,

LINE-Loox MECHANISM AND MARGIN sro?.

Application mea August 25, 192i. seriaifm, 495,329.

To all fecit-0m t concern 'Be it known that I, OTTO A. HonAN-soN,

a citizen of the United States, residing at "Woodstock, in the county ofMcHenry and State of Illinois, have invented certain new and usefulImprovements in Line-Lock kMechanism yand Margin Stops, off which thefollowing is a specilication.

This invention relates to typewriter mechanism. and especially to thatportion of the mechanism by which the operator is notified that thewriting is approaching the end of a line and by which the operation ofthe typewriter is arrested .at a predeterminedv point at the end of aline.

The invention has for its object the provision of mechanism of the classnamed which shall be of improved construction and cfm-ation and iseXempliied in the combination and arrangement of parts shown in portionof a typewriter showing one embodinient of the present invention appliedtheref;

Fig. 2 is a horizontal section substantially on line 2--2 of Fig. 1;

Fig. 3 is a front elevation of the' line lock mechanism with parts insection; and

Fig. 4 is a perspective view of a margin stop. v

In the drawings the invention is illustratd as applied to a foldingtypewriter having a main trame 10 and a platen carriage frame 11 whichis plvotally mounted on the main frame to swing into and out ofoperating position. The platen carriage frame 11 is provided with ways12 having ball bearings 13 for supporting thep'laten carriage 14. Thecarriage 14 is provided at each end with an upright end plate 15. onwhich a platen 16 is journaled. The end plates-15 have arms 17 pivotedat 1S thereon and the arms 17 are connected by a stop bar 19. One of thearms 17 extends upwardlyv to form afinger-piece 20 by which the stop bar19 may be swung rearwardly. The bar 1-9 is provided with notchesv 21 onits forward face and 22 on its lower tace. A stop23 is slidably mountedon the bar 19 and is formed ot a .pi'eceofA sheet metalbent to provide asleeve :surrounding the' bar and having a .downwardlyprojec'ting flange24 which carries a Contact foot `25xat its lower end. A..lange 26' is.bent upwardly from one edge or the lower wall of the sleeve to engagethe notches 2,2 on the stop rbar and `a spring 27 is rivetedat28 to theunder face of the .top wall of the sleeve 'to' resiliently hold the'vflange `26 in contact with the notches 22. When it is desired to adjustthe stop along the barpressu'reon the upper face of vthe. stop will freethe flange' 26 from the notches 22 andpermit the'. stop to slide freely`alo-ng the bar.

The head of the rivetl is elongated, as

shown at 29, to assist the spring 27 in holding the sleeve ina raisedposition relative to the bar. The head of the rivet 29 is rounded topermit tilting movement of the stop sleeve to disengage the flange 26. A

downwardly extending linger `30 is pivoted at 31 on the flange 24 and isheld against movement in onek direction by engagement with the end ofafslot 32 iny the foot piece 25'. Secured to thelower facel of theplaten carriage trame 11 is a bracket l33 having a bell clapper 34pivoted at 35 thereon. A bell 36' is' also secured to the .lower face ofthe platenV carriage frame 11 in .position to be struck by the clapper34. Aspring 37 normally draws the' clapper toward the bell 36. Arearwardly extending arm 38 is securedto the c'lapper 34 and projectsinto the path of the contact finger 30.

As the carriage vmoves to the left, as viewedI in Fig. 2,.the stop 23will assume the broken lineA position in Fig. 2 and the lcontact finger30 will move theA arm 38 into the broken line position shown in thatfigure. This will 'retract the clapper 34 and as the carriage continuesto move the linger 30 will slide past the arm 38 and release the'c-lapper permitting .it to return under the tension of the spring 37 andstrike the bell 36', thus warning 'the operator that the end of thelinel is being approached. Furth-er movement of the carriage to theleft, as viewed in that figure, will bring the contact Jfoot 25 intoengagement with an upwardly bentportion 39 on a lever plate 40 pivotedat 41 on the ylower face of the platen carriage frame 11. lThe plate 40is provided with a slot 42 which engages a pin 43 on the frame 11 andlimits the movement of the plate by its pivot 41. The spring 37isconnected to the plate 40 and normally holds the plate in the positionshown in Fig. 2. The plate 40 is provided with a rounded proj ection 44which engages a bifurcated arm 45 on a bellcrank 46. The bell crank 46is pivoted at 47 on the lower face of the frame plate 11 and has a for?wardly extending arm 48 provided with a;

hook 49 at its front end. The hook 49 lis arranged V,to engage .an'upwardly extending arm 50 secured to a rocker bar v51 pivoted at 52 tothe side plates of the -main frame 10. The rocker bar 51 is oscillatedby a universal bar 53 positioned beneath the key levers 54 and connectedwith the bar 51 by links 55 and arms 56 and 57. The arm 57 is rigidlyconnected withthe bar 51, while the arm 56 is pivoted at 58 on the sideof the frame 10. lThey two arms 56 and 57 havea pin and slot connection59 and aspring 60 normally draws the arm 57 lock the printing mechanismof the type-v writer. i v

If it is desired to write inthe margin past the position atwhich theline lock operates, the linger-piece 20 maybe depressedu which willswing the bar 19 outwardly, thus free-V ing the flange 39 from thefoot-piece As.

soon as these parts are moved out of contact with one another the spring37 will draw they flange 39 to the right, asviewed in Fig. 2,V and bringit opposite the inner edge of the:`

foot-piece`25. If the linger-piece 2O is now released the inner edge ofthe foot-piece25 will rest 'against the outer face of the flange 39 andthe carriage willfbe free to move farther to the'left. 'The movementofthe lever plate by the spring 37 will release the hook 49 from thelever 50 and free the keylevers 54 fromthe line locking mechanism. The.operation of the typewriter may be resumed untily the carriage comes tothe limit of itsmovement.

When it isdesired to return the carriage y'it is only necessary to moveit to the left along the ways 12. 'It will benoted that the foot-piece25 is proi'fidedon its right-hand edge with a beveled contact portion 61which will engage the flange 39 and swing the bar 19 outwardly to permitthe foot-piece to pass the flange. lWhen .the linger, 30 engages thelarm 34 the finger will turn about its pivot 31 sothat the movement .ofthe carriage will f not be interfered with,v 1When the platen carriageframe is moved upwardly about its pivot for folding the line lockmechanism will fold with the frame and when it is returned to operatingposition the hook 49 will resume its place adjacent the lever so that itwill be in position to perform'itsl locking function when operation ofthe typevriter is resumed.

The movement of the carriage to the right Y is limited by a stop 23similar to 23, but having its beveled surface and cont-act shoulder inreverse position from that of stop 23 so that the stop maybe shifted bythe finger-k Y piece 20 for writing in the left-hand margin yand willl.return past the `contact 'member 39 H which engages with the beveledportion of,

the step foot 25 when the carriage-is again fed to the left and throwsvthe stop `and bary outwardly, as in the case of stop 23.

l cla-im 1. ln a typewriter, a universal bar, an oscillatory memberoperated by said universal bar, a lever having a hook thereon forengaging said oscillatory member to prevent operation of said universalbar, a. platen carf y riage movable on saidtypewriter, andmeans foractuating -said lever to. lock said'loscillatory member when said platencarriage approaches the end of its travel. l

2. lnl a typewriter, a main frame having key leversy thereon, anupwardly projecting -arinon said mainA frame and arranged to beoscillated by said key levers, a supplemental frame movably mounted onsaid main frame and having a platen carriage movable transverselythereof, and a lock carried by said supplemental frame andarranged toengage said upwardly projecting. arm on said main frame to hold said armagainst operation when said carriage approaches the end p of itstravel.-

3. ln a typewriter, a supporting frame, a platen carriage arranged totravel transversely thereof, a. stop bar pivotally mounted on saidplaten carriage to swing in' a direction transversely of said bar, astop adjustablyz mounted on said baigkey levers for said typerwriter, acatch on said supporting frame for locking saidkey levers againstoperation,

. and means connected with said catch and arranged tobe engaged by saidstop to cause said catch to lock said key levers against operation whensaid platen carriage approaches the end of its travel. r

v 4. ln a typewriter, a supporting frame lia-ving aplaten carriagemovable transversely thereof,l a stop bar movably supported on saidcarriage, a stop arranged on .said bar, said stop comprising a sheetmetal sleeve having a fixed tooth thereon for engaging notches in saidbar, a spring for holding said tooth in contact with said-notches,andafoot-piece projecting downwardly from said sleeve and having al contactface in onefside thereof and a beveled face at the opposite side thereoflll) for swinging said stop bar upon said carriage to permit. move-mentof said carriage in one direction without interference by said'stop.

5. In a typewriter, a platen carriage, a stop bar movably mounted onsaid carriage and having notches therein, a stop slidably mounted onsaid stop bar, said stop having a tooth-piece thereon for engaging saidnotches, a spring 'for yieldingly holding said toothpiece in contactwith a notch on said bar, a pivoted contact linger on said stop, meansfor holding said linger against movement in one direction whilepermitting movement thereof relative to said stop in the oppositedirection, and a contact foot on said stop having a stop :tace at oneside thereof and a beveled tace at the opposite side thereof lor movingsaid stop bar to permit travel of said carriage in one direction.

6. In a typewriter, a supporting `trame, a platen carriage arranged totravel along said frame, a stop bar on said carriage, a stop adjustablymounted on said bar, an alarm device on said supporting frame, a contactmember on said stop arranged to actuate said alarm device when saidcarriage moves in one direction but permitting tree movement of saidcarriage in the opposite direction without affecting the alarm device, asecond contact member on said stop, line lock mechanism on said support"ing frame engaged by said second contact member subsequent to theoperation ot said alarm device, manually operated means for swingingsaid stop bar to permit movement of said carriage after the operation ofsaid line lock mechanism to continue the writing operation in the sameline, and means on said stop for moving said stop bar on said vplatencarriage to permit return movement of said carriage without interferenceby said line lock mechanism.

In a compactible typewriter, amain frame, key levers on said main frame,a universal bar operated by said key levers, an oscillatory memberactuated by said universal bar, a platen carriage trame oldably mountedon said main trame, a latch on said platen carriage trame movable intoand out of position to cooperate with said oscillatory member when saidplaten carriage frame is folded, a platen carriage arranged to traveltransversely ot said typewriter on said platen carriage frame, a stopbar pivotally mounted on said pla-ten carriage frame, a finger-piece formoving said stop bar, a stop on said bar having contact devices thereon,an alarm on said platen carriage frame and having actuating meansprojecting in the path of one of Said contact members on said stop sothat said alarm is operated by the movement of said carriage as itapproaches the end of a line, and a lever having a contact memberthereon projecting into the path of the other contact member on saidstop, said lever being arranged to actuate said latch to lock saiduniversal bar and key llevers aga-inst operation subsequent to theoperation of said alarm device, said finger-piece being movable to shiftsaid stop bar and :tree said latch to permit further writing in the sameline subsequent to the operation of said latch.

8. In a typewriter, a main frame having key levers and a universal barcarried thereby, a supplemental frame pivotally mounted on said mainframe, a platen carriage movable on said supplemental frame, a pair ofarms each having one end pivotally mounted on said platen carriage, astop bar connecting the other ends of said arms, a linger leverconnected with one of said arms for moving said stop bar bodily in adirection transverse to the length thereof, a stop adjustably mounted onsaid stop bar, a signal lever pivoted on said supplemental frame inposition to engage said stop as said carriage moves along saidsupplemental frame, a bell crank lever pivotally mounted on saidsupplemental frame having one end thereof arranged in the path of saidstop in position to be engaged thereby subsequent to the engagement ofsaid stop and signal lever, a catch mounted on said supplemental frameand actuated by said bell crank lever, a movable member connected withsaid universal bar and arranged in position to be engaged by said catchwhen said bell crank lever is actuated by said stop, and a common springconnected to said signal lever and bell crank lever to hold said leversin position to be engaged by said stop.

9. In a typewriter, a main frame having key levers and a universal barmounted thereon, an oscillatory member connected with said universal barand actuated by said key levers, al supplemental frame pivotallyconnected with said main frame and having a catch pivotally mountedthereon in position to engage said oscillatory member when saidsupplemental frame is in operative position to hold said oscillatorymember and universal bar against operation, a bell crank lever pivotallymounted -on said supplemental frame and having pivotal connection withsaid catch, a platen carriage mounted to move along said supplementalframe, a stop bar carried by said platen carriage, an adjustable stop onsaid stop bar arranged to engage said bell crank lever and actuate saidcatch to engage said oscillatory member when said carriage reaches apredetermined position in its travel, and means for shifting said stopbar in a direction transverse to the length thereof to tree said stopfrom said bell crank lever.

ln testimony whereof l have signed my name to this specilication on this22nd day of August, A. D. 1921.

OTTO A. HOKANSON.

